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TW7000MS TW7000 HF Transceiver Technical Manual Datron World Communications Inc. Manual Part No. TW7000MS Release Date: June 2007 Revision: F 3030 Enterprise Court Vista, CA 92081, U.S.A. Phone: (760) 597-1500 Fax: (760) 597-1510 E-Mail: sales@dtwc.com www.dtwc.com...
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Information regarding updated boards, schematics, part lists including the new Processor board, Ref/Control board and the High Stability option. 6/2007 Removal of references to LCD/driver board, information for the FALC option and updates as required to boards, schematics and part lists. TW7000MS...
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Software, documentation, and All rights reserved. any copies of each to Datron. This Software is licensed “AS IS” and Datron provides a war- Datron World Communications ranty that covers the media upon which the Software is embed- This manual, as well as the software described in it, is ded for a period of 30 days from receipt of the product.
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Remedies: Buyer’s sole remedies and the entire liability of Datron are set forth above. In no event will Datron be liable to Buyer or any other person for any damages, including any incidental or consequential damages,...
CHAPTER 1 INTRODUCTION The TW7000 The Datron World Communications Inc. (DWC) TW7000 is an advanced HF transceiver providing a complete range of both voice and data operation over the entire 1.6 to 30 MHz HF spectrum. The TW7000 uses multiple...
(RS422/485) to provide data protocol for external control of the radio through a computer. This is in addition to the standard RS232 interface. 7000TC Digital selective calling system plus automatic path evaluation. Combines all functions of Transcall, Selcall, and TransAdapt. TW7000MS...
TW7000AIRSELCALL Operating with N-1304A (or equivalent) SELCALL devices and Datron power amplifiers, it adds a secondary control line to the radio and allows use of the ICAO-mandated ground-to- air SELCALL 3-tone system. TW7000 Variations This manual provides information necessary to operate any variation of the TW7000.
Input Power Reverse polarity, transient and under/over voltage Protection Antenna Port SO-239 Antennas 50 ohms or automatic antenna tuner (AT7000, RAT1000C) Interface Control: two RS32 COM ports; compatible with EIA RS422/423/485 with option. Audio: 600 ohms, balanced and isolated TW7000MS...
To prevent unwanted noise, locate the TW7000 as far away as possible from electrostatic and magnetic field-generating equipment. When attaching external cables to the TW7000, allow for sufficient slack in the cables. This prevents damage from sharp bends and ensures easy disconnection. TW7000MS...
The rear panel of the TW7000 is fabricated from aluminum sheet metal and attached to the rear panel bezel by 6 screws. The pattern of punched holes on right-side is the air intake for the internal heat sink. The left-side hole pattern TW7000MS...
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If a DWC power cable is not available, use a 14 AWG cable for runs up to 3 feet, a 12 AWG cable for runs to 9 feet, or a 10 AWG cable for longer runs. TW7000MS...
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Each of the three connectors on the rear panel is a D-Submini socket with 25 pins. For the location of these connectors, refer to the "TW7000 Rear Panel" figure on page 2-3. TW7000MS...
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BALRXA2 (balanced RX audio) BALTXA1 (balanced TX audio) BALTXA2 (balanced TX audio) AUXPTT\ Select Busy +12V ACC EXTCWKEY (external CW key) Strobe Data 0 Data 1 Data 2 Data 3 Data 4 Data 5 Data 6 Data 7 ACK (acknowledge) DI/OSEL TW7000MS...
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+12V ACC +12V ACC External The TW7000 has provision for an embedded encryption board, the Encryption 7000ENCR option. External encryption can also be used with the TW7000 and connected to Accessory 1 or Accessory 2 using the following pins: TW7000MS...
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Pins on Accessory 1 are: Pin Number Description Ground COM1RXD (RS422/RS485) COM1CTS (comport 1 clear-to-send) COM1TXD (RS422/RS485) COM1RTS (comport 1 request-to-send) If the 7000RS option is installed, the COM1TXD and COM2RXD becomes a 2-wire bidirectional RS422/485 interface. TW7000MS...
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ADATA (tuner data) ACLOCK (tuner clock) ASTROBE (tuner strobe) +12V ACC The AT7000B and RAT7000B uses Accessory 3 with the following pins: Pin Number Description Ground Ground ATURX (tuner RX data) ATURX (tuner RX data) +12V ACC +12V ACC TW7000MS...
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Data 1 Data 2 Data 3 Data 4 Data 5 Data 6 Data 7 ACK (acknowledge) ALE/Transcall/ The external ALE/Transcall/Selcall alarm driver is available on Accessory 2 Selcall Alarm using the following pins: Pin Number Description EXTCWKEY TC/SCALM (alarm) 2-10 TW7000MS...
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2: Installation C991559 AT7000B C991620 RAT1000C ACC#3 C991505 ACC#2 REMOTE C991505 ACC#1 TW1000D C991507 To Front Panel Connector C991539 F1 F2 GND C991539 TW500D F1 F2 GND Figure 2-3. RF Cabling Accessories TW7000MS 2-13...
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RAT1000P To Front Panel Connector TW7201 F1 F2 GND ACC#1 C992307 REMOTE ACC#2 TW500D C992216 TW7201E C991830 REMOTE F1 F2 GND C992094 C991897 C991964 C992361 C992377 TW5300 C992161 TW5810 DT9400 DT5300 DT110 TW5850 Figure 2-4. Control Cabling Accessories 2-14 TW7000MS...
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You can control the TW7000 remotely from a standard computer using Control Accessory connectors 1 or 2 on the rear panel. A custom software program is available from Datron that runs on any PC using Windows™. For the connections to use, refer to the "EIA Data Interface Standards" section on page 2-8.
Power Amplifier board +12V Unregulated, switched input power to the front panel UNREG assembly and the remote control devices via the REMOTE rear panel connector +12V ACC Regulated, switched, filtered +12 Vdc provides power to all of the rear panel connectors TW7000MS...
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Unregulated, switched, filtered +12 Vdc drives the heat sink fan +12V Regulated, switched, filtered +12 Vdc provides power to all internal subassemblies in the TW7000 except the front panel Regulated, switched, filtered +5 Vdc for the Processor board, accessory 3 connector, and the ALE option slot TW7000MS...
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3: Theory of Operation Figure 3-1. System Diagram TW7000MS...
J8-7 to the front panel (J1-30) to drive the speaker, or to Accessory 2 (pin 22). Unbalanced squelched audio is provided at J8-6, J18-19 to both accessory 2 and accessory 3 (pins 6 and 13) connectors. TW7000MS...
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The squelch circuit is activated via a signal from the Processor board and is controlled by the squelch on/off switch on the front panel. The receiver’s automatic gain control (AGC) is generated and the threshold set in the 5 MHz IF board. 3-10 TW7000MS...
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3: Theory of Operation Figure 3-5. Transceiver Receive Path Diagram TW7000MS 3-11...
Receive and Transmit Path Subassemblies Standard subassemblies in the receive/transmit path include the following: • VSWR circuit • RF Filter board • RF Power Amplifier board • 75 MHz IF board • 5 MHz IF board • Audio board • Squelch board 3-12 TW7000MS...
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3: Theory of Operation Figure 3-6. Transceiver Transmit Path TW7000MS 3-13...
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The mainframe schematic that follows displays all of the interconnect wiring between the front panel, rear panel, and motherboard. This schematic traces signals between assemblies. Most signal lines have arrows that help determine the direction of the signal flow. 3-14 TW7000MS...
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Note: There are several other lines that pass through this board, going between J21 (processor) and J25 (Accessory 3 on the rear panel). Table 5-1 lists only those lines that actually interface with the circuitry on the Power Supply board. TW7000MS...
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J20-4. 12.0 Vdc ±.6 Vdc should be present. Vary the power supply from 10.5 Vdc to 16 Vdc. The voltage at test point should drop to zero when the power supply is at or below 10.0 Vdc and at or above 15.8 Vdc. TW7000MS...
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4: Technical Description Power Supply Board Figure 4-1. Power Supply Block Diagram TW7000MS...
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4: Technical Description Power Supply Board Figure 4-2. Power Supply Board Component Locations (738223 Rev. G) TW7000MS...
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Reflected power indicator FWDPWR Forward power indicator SPITXD Serial TX data line /BITE BITE line Filter band 1 control line Filter band 3 control line Filter band 5 control line Filter band 7 control line No connection No connection 4-12 TW7000MS...
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Repeat the following adjustments to R1 and R22 until no further adjustment is required: • Adjust R1 (high power set) for a transmit output power of 100W average, single tone at 14.75 MHz. TW7000MS 4-13...
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Check for low power at approximately 10W, medium power at approximately 25W, and high-power at approximately 100W with Alpha 5 set to the default settings for each power level (refer to the TW7000-MSOP operator manual for information on the Alpha menu and function 5). 4-14 TW7000MS...
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RES SM CF 100R 0.1W 5% 0805 013101000 RES SM CF 100R 0.1W 5% 0805 013753000 RES,SM CF 75K 0.1W 5% 0805 013103000 RES SM CF 10K 0.1W 5% 0805 170335 RES, 25K TRIM SIDE ADJ 013222000 RES SM CF 2.2K 0.1W 5% 0805 4-20 TW7000MS...
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RES SM CF 22K 0.1W 5% 0805 013682000 RES SM CF 6.8K 0.1W 5% 0805 013331000 RES SM CF 330 0.1W 5% 0805 013222000 RES SM CF 2.2K 0.1W 5% 0805 013103000 RES SM CF 10K 0.1W 5% 0805 TW7000MS 4-21...
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+12V input +12V SPIRXD Receive serial data line SPICLK Clock line Not used First LO synthesizer enable Third LO synthesizer enable Ground +12V input +12V SPITXD Transmit serial data line BITE BITE signal to processor BITE enable DDS enable TW7000MS 4-23...
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At -113 dBm input, check SINAD at various frequencies from 1.6 to 30 MHz (this verifies that the synthesizer is locking). With the signal generator set to 8.001 MHz +6 dBm level, turn carrier off, then on. The RX tone should sound normal. 4-24 TW7000MS...
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The third LO (BFO) output signal at J55 should read 5.000 MHz and 5.003 MHz. The level should be 0 dBm, ±2 dBm. The second LO output signal at J54 should read approximately 70.000 MHz. The level should be 0 dBm, ±2 dBm. TW7000MS 4-25...
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113470 RES,47 OHM 1/8W 5% CARBON FILM 113472 RES,4.7K 1/8W 5% CARBON FILM 113220 RES,22 OHM 1/8W 5% CARBON FILM 113100 RES,10 OHM 1/8W 5% FILM 113151 RES,150 OHM 1/8W 5% CF 113473 RES,47K 1/8W 5% CARBON FILM 4-38 TW7000MS...
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IC, MB87086APF PLL SYN SOIC16 330368 IC,MC33078 330471 IC,MAX680 330418 IC,STEL-1179,NCO ADAPTERBD2 ADAPTER ASSY,330470 330015 IC,VREG,7805,TO220,5V XL13 490067 INDUCTOR CAN XL14 490067 INDUCTOR CAN XL15 490067 INDUCTOR CAN XL16 490067 INDUCTOR CAN XL17 490067 INDUCTOR CAN 490067 INDUCTOR CAN TW7000MS 4-39...
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RF pass through this board, it is only used to process signals in the transmit path. Reflected Forward Power Power Antenna RF In/Out Dectector Dectector RVSPWR FWDPWR Connector J19 Description RVSPWR - Reflected RF power sample FWDPWR- Forward RF power sample Figure 4-10. VSWR Detector Board Block Diagram 4-40 TW7000MS...
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RF filter BITE line Filter band 3 select line Filter band 4 select line TRSW T/R relay control line Filter band 5 select line Filter band 6 select line Filter band 2 select line Filter band 1 select line 4-46 TW7000MS...
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RELAY,SP PCB MOUNT 459325 IND ASSY,10T,#20,1-490006 451122 IND ASSY,8T#20 1-490008 459424 IND ASSY,6T#20 1-490008 COMPRS 459424 IND ASSY,6T#20 1-490008 COMPRS 459119 IND ASSY, 13T#22 1-490009 459103 IND ASSY,11T#22,AWG,1-490009 459174 IND ASSY,10T#22 AWG 1-490009 459131 IND ASSY, 6T#20 AWG 1-490008 4-54 TW7000MS...